Reenforced-metal lath



Feb. 3, 1931. `w. cs, HURLBERT, JR., ETAL 1,791,210

REENFORCED METAL LATH Filed Deo. 1'7, 1927 WraH-urlbe W/rwsss Patented Feb. 3, 1931 UNITED STATES PATENT erica WILLIAM GRISWOLD HURLBERT, JR., OF WARREN, AND VI'ILLIAM J. PURSER, OF YOUNGSTOWN, OHIO, ASSIG-JilORSV TO THE BOSTWCK STEEL LATE COMPANY, OF

NILES, OHIO, A CORPORATION OF OHIO REENFORCED-METAL LATH Application led December 17, 1927. Serial No. 240,720.

This invention relates to the art of metal lathing, and more particularly to a reenforced type of non-expanded metal lath presenting a strong and ellicient structure for use as a supporting and reenforcing element forcementitious material in the construction of partitions, floors land ceilings and analogous building purposes. y

A principal object of the invention is to improve that type' of metal lathing which has been extensively employed and known as the truss loop metal lath, whereby that particular type of lathing shall be given a maximum strength and stiffness, at the same time providing effective keys for the plaster or other cernentitious material. Also, it is an object of the invention to provide a novel lath formation having structural characteristics permitting the same to be manufactured readily andY economically.

Heretoformit has been known that a. desirable construction of metal lath can be made by slitting a metal sheet anddeflecting to one side vthereof portions of its metal, producing an arched type of loops which by reason of their structural form contribute strength to the sheet and also which, by'reason'of their shape and extent of deflection from the flat plane` of the sheet, provide keying openings through which the plastic material will key or bond itself.r

rlfhe present invention provides a material improvement in this typeof'lath construe.- tion chiefly by novel reenforcement and strengtheningthereof so it may become? a substantial recnforcing factor in the wall or other structure. To that end the invention presents a structiu'c whichcontributes most substantially and effectively to a reenforcenient of the sheet in practically every direction, not only lengthwise and cross-wise, but

diagonally of the sheet by reason of the peculiarities of the reenforcement; also providing adequate and effectivelieying openings.v

With these and other objects in view which will more readily appear to those familiar with the Vart the invention consists in the novel combination of features hereinafter morer fully Y indicated and claimed, and the essential features of the new reenforced structure,

while susceptible of structural modification, without departing'froin the spirit and scope of the invention, certain preferred and practical embodiments thereof are shown in the accompanying drawings, in which Figure l is a top plan view of a reenforced non-expanded metal lath fabricated in accordance with the present invention.

Figure 2 isa bottom' plan view of a portion o f the new lath, exhibiting the bottom formation.

Figure 3 is a detail perspeotiveview of the new lath, visualizing more particularly the structural characteristics of the reenforcement, in combination with the arched trussing loops.

Figure 4 is a detail cross-sectional View of a portion of the product on the line 4-4 of Fig. l.

Figure 5 the product on Figure 6 is a plan view of the new structure.

Figure 7 is a `detail sectional viewof the modified structure on the line 7 -7 of Fig. 6.

In. carrying forward the' invention any suitablemachine or process may be utilized in the fabrication of the product, and it is not the yintention to limit the invention by any particular machine or method of manuilfacture. i

` Jrccordingly, regardless of they steps of fabricating the new' reenforced yproduct the same involves in its general structure aflat metal body sheet l of steel or any suitable material for the purpose and of Ia suitable gauge. T his body sheet is defori'ned'during the process'of fabrioating'the lath to rprovide the same with a pluralityV of longitudinally extending reenforcingjribs Q'of is a similar view 'of a portion of the line 5-5 of Fig-1.

of a modification mation, that is to say,- the grooves in the sheet which form the ribs being open or exposed at one side of the sheet, while the closed sides of the grooves which form the ribs proj ecb from the opposite side of the sheet.

in connection with the-longitudinally exgrooved for- .I

tween every pair of the longitudinal ribs i). and intercoinmunicating and connecting therewith. By iiiterconnnunicating is meant that the cross ribs 3 are also of the grooved type, and the grooves of said cross ribs 3 open directly into the grooves of the longitudinal ribs 2, seen in Fig. 2, and the projecting parts oit the said ribs 3 project from the same sideot the sheet as the longitudinal ribs do, and integrally connect therewith, as seen in Fig. l.

Thus, in the 'fabrication of the body sheet l in the inanner described there is provided between every pair ot the longitudinal ribs Q a longitudinal succession or plurality of depressed plaster seats 4 bounded by connecting parts ot the longitudinal and cross ribs Q and 3. The metal in each of these depressed seats 4 is pr vided with parallel longitudinal slits 5 which su..iciently release the metal between them to permit such metal to be upset or deflected troni one side ot the plane of the sheet into arched or bowed trussing loops (l. Each of these trussing loops, particularly at its aenith or crown, has its opposite edge t langes pinched inwardly into approximate parallel relation as best seen in Fig. 4 of the drawings, thus. giving additional and substantial reentorcement or stillness to the loop itself, as well as to the structure as a whole. Furthermore, the metal at the edges ot the longitudinal slits 5 is bent in a direction away from the plane of the sheet to provide deflected edge reenforcing flanges 8 which are also shown in Fig. 4 ot the drawings.

lt will now be seen that every depressed plaster seat 4 is surrounded by its reenforcing rib portions 2 and 3; also that the body metal is reentorced at the edges 8 ot the slits 5, and is substantially reentorced throughout its length by the individually reentorced arched or bowed trussing loop G. This reen-` forcement is multiplied throughout the entire sheet lengthwise, between every pair of the longitudinal ribs 2 well as crosswise ot the sheet. (thus providing a structureV of exceptional strength and stiffness, both longitudinally and laterally, which gives to the product. high etliciency as a recnf'orceinent tor the wall or other structure in which it is incorporated.

' ln addition to the utility ot the features inferred to, as reenliorcing elements. tor the lath product it will be seen. that the structure provides most effective keys for the plastic material by reason ot the keying openings provided transversely beneath the arched or bowed trussing loops. and the keying openings provided through the sheet between the reentorced slitted portions 5. Also, the depression about each trussing` loop, which consti tutes a plaster seat 4, receives the plaster or other ceinentitious material in the torni ot' a rectangular block that contributes materially to the substantial keying` oit the plaster to the lath, in additionto the strength given to the wall or other structure by the plaster bonding through the keying openings rel'erred to.

By way of illustrating the range oi' inodification that may be resorted to in carrying out the invention there is shown in Figs. 6 and 7 ot the drawings a structural feature that adds an additional function to the cross ribs 3. That feature consists in piercing each cross rib 3 with a longitudinally disposed key opening 9 and striking outwardly the side edges ot said opening producing edge flanges, as best seen in Fig. 7, which have the eiiect ot' reentorceinent, and thereby maintaining the reent'orcing effect of the cross rib. At the saine time openings 9 are sufficiently large to permit of the plaster or other cementitious material keying therein.

The drawings illustrate the trussing loops as well as the reeintorcing cross ribs in staggered relation transversely oi the sheet. but it will olE course be understood that the invention is not limited to this particular arrangement, which is illustrated as a preferred eX- anmle ot the product.

TWithout further description it is thought that the :Features and advantages of the invention will be readily apparent to those skilled in the art, and it will of course be understood that changes in the torni, proportion and ininor details ot construction inay be resorted to, without departing troni the spirit of the invention and scope of the appended claims, I

'Vile claim l. A non-expanded reenforced nietal lath including a body sheet provided with offset arched loops projected from the plane of the sheet at one side thereof, and integral interconnecting longitudinal and transverse reenforcing` ribs, each arched loop lying between and parallel to a pair of the longitudinal ribs and being conlined between a pair of the transverse ribs.

2. A non-expanded lath including a body sheet having integral interconnected longi tudinal and cross grooved ribs forming at one side of the sheet depressed plaster seats, and an arched grooved loop projected from one side of the plane of the sheet within each ot said plaster seats. y

3. A inetal lathV consisting of a sheet ol inetal provided with longitudinal and transverse stil'lening ribs forming a. plurality of separate plaster seats, and an arched rib pressed from the metal of the sheet within a plurality at least of said plaster seats.

4. A. metal lath consisting of a sheet of inetal provided with continuous longitudinal stiffening ribs providing parallel channels, transverse ribs across each channel dividing same into separate plaster seats, the transverse ribs of alternate channels being alined with one another and disalined with respect to the transverse ribs of the other channels,

and a rib pressed from the nietal of the sheet within each of a plurality of said plaster seats.

5. A metal lath consisting of a sheet of metal provided with longitudinal and transverse stiiiening ribs forming a plurality of separate plaster seats each of a length substantially twice greater than the width theref,`and a central longitudinally extending rib within each of a plurality of said plaster seats extending substantially throughout the length thereof.

6. In a metal lath, a sheet of metal provided with spaced slits, the metal between said slits being squeezed together and arched, and

the marginal portion of inetal at the outside of the respective slits `being bent to provide a flange disposed oppositely to the arched portion between the slits.

In testimony whereof we hereunto aiix our signatures.

WILLIAM GRISWOLD HURLBERT, Jr. WILLIAM J. PURSER. 

